For-example-the-molecule-CH-sub-2-sub

For example, the molecule CH 2 = CH – CH 2 – CH = CH 2 ( 1, 4-pentadiene ) is homoconjugated because the two C = C double bonds ( which are π-systems because each double bond contains one π bond ) are separated by one CH 2 group .< ref > Some orbital overlap is possible even between bonds separated by one ( or more ) CH 2 because the bonding electrons occupy orbitals which are quantum-mechanical functions and extend indefinitely in space.

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